Oh, ok. So why was it better to play them all at once instead of chaining them again?
The only reasons I can think of to chain SoSas are 1) if you are at 8 cards and want to avoid discard and 2) to time an EM correctly. And I'm not even sure if you could find a situation where chaining them would help in the second case over just playing them separately; I'd have to think about it more than I want to :p
I'll bite. You have 200hp, and the opponent has 39 damage on the field. You will win from poison in 4 turns. If you play the SoSacs one at a time:
Turn 1: You take 40 damage from SoSac. Poison means you win in three turns.
Turn 2: You have 199 hp. Poison means you win in two turns.
Turn 3: You have 200 hp. Take 40 damage from SoSac, or don't play SoSac. You either have 160 or 200 hp and will win next turn.
Turn 4: You either have 161 or 199 hp, depending on choice from above. You win without EM.
But if you played the two SoSacs at once...
Turn 1: You take 80 damage from SoSac. Win in three turns.
Turn 2: Poison means you win in two turns. You have 159 hp.
Turn 3: TTW: one. HP: 198.
Turn 4: You win this turn, and have 200hp. EM.
In other words, in cases where you have close to max hp, the opponent has between 20-40 damage (closer to 40, the farther away from your max you can be), and you will win in 4 turns, playing multiple at a time will result in an EM while not playing multiple won't.